Green’s Dictionary of Slang

dicky n.5

[ext. of dick n.1 (5)]

[19C+] the penis.

In compounds

dicky check (n.)

[1990s+] (US Und.) a search of the genital area, usu. for drugs.

dicky diaper (n.)

[early 19C] a linen-draper.

dicky-licker (n.) [var. on dicklicker n.] [1930s+] (orig. US)

a homosexual, esp. a fellator.

dicky-waver (n.) (also dickie-waver)

[1970s+] (US) an exhibitionist.